Alright, let's work through 1964 times 9491 step by step
1964 × 9491 = 9491 × (1964)
+ 9491 × 4 that results in 37964
+ 9491 × 60 that is equal 569460
+ 9491 × 900 that is equal 8541900
+ 9491 × 1000 that equals 9491000

= 18640324
